A doctor in California destroys the entire state by experimenting with explosive fault line devices, and Parker must prevent a tidal wave from killing over ten million people. Complications arise when he Backsteps and ends up with a strange creature capable of generating temporal disruptions that is intent on destroying Backstep.

Parker Backsteps to prevent a mine shaft from exploding and killing thousands of people, including a nearby military base. However, things go awry when the Sphere materializes deep within the Earth and the Backstep team have no idea where Frank is or what he was sent back to avert.

Parker Backsteps to save a Nobel Peace Prize recipient, but passes through the side of an airline flight, causing it to crash. A boy on board the plane is taken along with Frank into the past, and he must save the Peace Prize winner, stop the crash, and help the boy save his grandfather.

Parker must save Talmadge, who is captured by commandos who intend to torture and kill him for information on Operation Backstep. But when he fails, only his newfound ability to loop time lets him complete the mission.

A top secret weapon project test gone awry seemingly kills all life on Earth except Parker, Olga, and Owsley who are deep underground in a secret government facility. Now they must make it back in time to Backstep.

A militia leader detonates a nuclear bomb in Washington, but the Backstep goes awry when the Sphere goes back without Parker - the team has 7 days to figure out what disaster is coming and resolve it before it's too late, and all they have to help them is a reluctant psychic who was part of one of Mentnor's past experiments.

Atmospheric interference causes Parker to return from a back-step with a woman who died fifteen years ago, and whose presence threatens to unravel the fabric of the universe.

An astronaut returns with an alien virus that makes him irresistible to women, and Olga soon finds herself pregnant with a clutch of alien babies.

Parker must prevent an overzealous officer from launching a nuclear missile during a crisis with Korea.

A boy with the psychic ability to project fire kills a Canadian trade minister and Parker must stop him and relieve him of his powers.

Olga and Parker get romantically involved when he backsteps to save her life after she encounters terrorists blowing up an oil line in the wilderness area she's vacationing in.

When Talmadge becomes incapacitated because of an apparent brain aneurysm, Nathan Ramsey is appointed as his successor, and Ramsey immediately begins to implement Parker's removal.

Parker must decide whether or not to heed the words of a man who claims to have Backstepped from the far future, and warns that Earth's safety depends on the death of a revered holy man.

Parker teams with an old friend, a Navy SEAL, to prevent the assassination of the new president of Columbia at a White House state dinner.

Parker must prevent the U.S. President from being blackmailed after agents of a South American dictator steal his private psychiatric tapes.

A power surge sends Parker into a mirror universe where his colleagues now play threatening roles.

In Russia over 38,000 people are wiped out by Sarin gas, but it is a ploy by a Russian military officer to gain access to Olga and create their own Backstep Sphere.

Donovan puts his resignation from the team on hold in order to help Parker with a rescue operation to maintain peace in Bosnia.

Parker must go back to his old mental hospital to work undercover to find a killer who influences others to kill and maim based on astrological patterns.

Mentnor's post-World War II experiments return to haunt him, as a virus that causes homicidal madness gets loose in an isolated New England village.

A missile test disaster sends Parker back in time to find a beautiful revenge-minded thief who has stolen the device that will cause the disaster.

Parker ignores phone calls from someone claiming to be an old girlfriend, Deloris, until she carries out her threat to paralyze the nation's air traffic control system.

Parker causes the delay of an important Backstep mission to go to New Orleans to prove the innocence of an old friend scheduled for execution for a murder he didn't commit.

While on a mission to prevent the murder of the U.S. Attorney General by a religious zealot, Parker is plagued by flashbacks to a disastrous mission in Somalia where the rest of his team were killed.

Unaware that a vengeful Chechen rebel is tracking him, Parker leads terrorists to Project Backstep.